{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ZEC3PVCKITJ6ZHSFXYUXSGHQYT","short_pith_number":"pith:ZEC3PVCK","canonical_record":{"source":{"id":"1906.05668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-11T07:55:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"bc878b6a650cdd25eaff206a90e34629a682a1d41176931d4c146f5076d2ee26","abstract_canon_sha256":"73eacf0a90e0182a48e4e5ce8e2fea4feaa085b5abba635ef9ed04b5a9a7159a"},"schema_version":"1.0"},"canonical_sha256":"c905b7d44a44d3ec9e45be297918f0c4c2d3db3d141ff3f4f23d95fb6dbc58f4","source":{"kind":"arxiv","id":"1906.05668","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.05668","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"arxiv_version","alias_value":"1906.05668v1","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05668","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZEC3PVCKITJ6","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZEC3PVCKITJ6ZHSF","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZEC3PVCK","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ZEC3PVCKITJ6ZHSFXYUXSGHQYT","target":"record","payload":{"canonical_record":{"source":{"id":"1906.05668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-11T07:55:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"bc878b6a650cdd25eaff206a90e34629a682a1d41176931d4c146f5076d2ee26","abstract_canon_sha256":"73eacf0a90e0182a48e4e5ce8e2fea4feaa085b5abba635ef9ed04b5a9a7159a"},"schema_version":"1.0"},"canonical_sha256":"c905b7d44a44d3ec9e45be297918f0c4c2d3db3d141ff3f4f23d95fb6dbc58f4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:24.656928Z","signature_b64":"qZ68nezPfrb6sIp3z1ADsR///deU2rtWK6fbJhcEFSwOBcU3/30KWvRLrLYEzRf14TRlj7bBZl5dQA2YiQn0AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c905b7d44a44d3ec9e45be297918f0c4c2d3db3d141ff3f4f23d95fb6dbc58f4","last_reissued_at":"2026-05-17T23:43:24.656578Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:24.656578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.05668","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vl/z8Hqtdw1e4QYllQts5/Qcb90tGZVDEMm8/T84ySIDa0avzWlNEgRD/zP3rloqLrwNgsliHB0S6gGsjP/aCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T08:12:04.095400Z"},"content_sha256":"d4dcc9f82929467db0707ed8a5c1aec2086e8c380e0cf999a17705fa03739423","schema_version":"1.0","event_id":"sha256:d4dcc9f82929467db0707ed8a5c1aec2086e8c380e0cf999a17705fa03739423"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ZEC3PVCKITJ6ZHSFXYUXSGHQYT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observational Tests of Gauss-Bonnet Like Dark Energy Model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"A. Khodam-Mohammadi, Z. Molavi","submitted_at":"2019-06-11T07:55:07Z","abstract_excerpt":"The consistency of some dynamical dark energy models based on Gauss-Bonnet invariant, ${\\cal G}$, is studied compared with cosmological observational tests. The investigated models are modified form of Gauss Bonnet dark energy, MGB-DE and two other versions which are interacting MGB and $n_0$MGB. The energy density of proposed models are combinations of powers of the Hubble rate, H, and its time derivative. To inquire the performance of MGB dark energy models, we have used data analyzing methods and numerical solutions, in both background and perturbed levels, based on recent observational dat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05668","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V0VScg4xrMATxE2M5rwMvRmAKIyfmhgcKHCoguJ4BIwVVNgKGm/jn23Qhy+8vyNMw+GECLxC2eZbgO3e22Z4Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T08:12:04.095773Z"},"content_sha256":"157954ca54479f006160d260decb4dc9bcc66397efd383c0eab7d379c92051e0","schema_version":"1.0","event_id":"sha256:157954ca54479f006160d260decb4dc9bcc66397efd383c0eab7d379c92051e0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/bundle.json","state_url":"https://pith.science/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-12T08:12:04Z","links":{"resolver":"https://pith.science/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT","bundle":"https://pith.science/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/bundle.json","state":"https://pith.science/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZEC3PVCKITJ6ZHSFXYUXSGHQYT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZEC3PVCKITJ6ZHSFXYUXSGHQYT","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"73eacf0a90e0182a48e4e5ce8e2fea4feaa085b5abba635ef9ed04b5a9a7159a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-11T07:55:07Z","title_canon_sha256":"bc878b6a650cdd25eaff206a90e34629a682a1d41176931d4c146f5076d2ee26"},"schema_version":"1.0","source":{"id":"1906.05668","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.05668","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"arxiv_version","alias_value":"1906.05668v1","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.05668","created_at":"2026-05-17T23:43:24Z"},{"alias_kind":"pith_short_12","alias_value":"ZEC3PVCKITJ6","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZEC3PVCKITJ6ZHSF","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZEC3PVCK","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:157954ca54479f006160d260decb4dc9bcc66397efd383c0eab7d379c92051e0","target":"graph","created_at":"2026-05-17T23:43:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The consistency of some dynamical dark energy models based on Gauss-Bonnet invariant, ${\\cal G}$, is studied compared with cosmological observational tests. The investigated models are modified form of Gauss Bonnet dark energy, MGB-DE and two other versions which are interacting MGB and $n_0$MGB. The energy density of proposed models are combinations of powers of the Hubble rate, H, and its time derivative. To inquire the performance of MGB dark energy models, we have used data analyzing methods and numerical solutions, in both background and perturbed levels, based on recent observational dat","authors_text":"A. Khodam-Mohammadi, Z. Molavi","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-11T07:55:07Z","title":"Observational Tests of Gauss-Bonnet Like Dark Energy Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.05668","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d4dcc9f82929467db0707ed8a5c1aec2086e8c380e0cf999a17705fa03739423","target":"record","created_at":"2026-05-17T23:43:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"73eacf0a90e0182a48e4e5ce8e2fea4feaa085b5abba635ef9ed04b5a9a7159a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-11T07:55:07Z","title_canon_sha256":"bc878b6a650cdd25eaff206a90e34629a682a1d41176931d4c146f5076d2ee26"},"schema_version":"1.0","source":{"id":"1906.05668","kind":"arxiv","version":1}},"canonical_sha256":"c905b7d44a44d3ec9e45be297918f0c4c2d3db3d141ff3f4f23d95fb6dbc58f4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c905b7d44a44d3ec9e45be297918f0c4c2d3db3d141ff3f4f23d95fb6dbc58f4","first_computed_at":"2026-05-17T23:43:24.656578Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:24.656578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qZ68nezPfrb6sIp3z1ADsR///deU2rtWK6fbJhcEFSwOBcU3/30KWvRLrLYEzRf14TRlj7bBZl5dQA2YiQn0AA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:24.656928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.05668","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4dcc9f82929467db0707ed8a5c1aec2086e8c380e0cf999a17705fa03739423","sha256:157954ca54479f006160d260decb4dc9bcc66397efd383c0eab7d379c92051e0"],"state_sha256":"03e4835c94bd2e194e3221021c27e783710f7df496fa1e80719ec5d06f8b933d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9oK/HHWQFk9n8MhERH0STLB6RNwxggSsa+UY8RTwDL1caplefiDfoyfjp92YkUczvx2C8CLeF/sm/0iiGdboCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T08:12:04.097881Z","bundle_sha256":"e98055db5cb2d8f71765c7d2841dfa8345def90608d1eac936b4b3a958b1e7df"}}